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xsSnapshot.c
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xsSnapshot.c
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/*
* Copyright (c) 2016-2018 Moddable Tech, Inc.
*
* This file is part of the Moddable SDK Runtime.
*
* The Moddable SDK Runtime is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Moddable SDK Runtime is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Moddable SDK Runtime. If not, see <http://www.gnu.org/licenses/>.
*
*/
#define _GNU_SOURCE
#include "xsSnapshot.h"
#if mxMacOSX || mxLinux
#include <dlfcn.h>
#endif
static void fxIndexInstance(txMachine* the, txSnapshot* snapshot, txSlot* theCurrent);
static void fxIndexReference(txMachine* the, txSnapshot* snapshot, txSlot* theSlot);
static void fxIndexSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot);
static void fxIndexSlots(txMachine* the, txSnapshot* snapshot);
static void fxLinkChunks(txMachine* the);
static void fxMeasureSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot, txSize* chunkSize);
static void fxMeasureChunk(txMachine* the, txSnapshot* snapshot, void* address, txSize* chunkSize);
static void fxMeasureChunkArray(txMachine* the, txSnapshot* snapshot, txSlot* address, txSize* chunkSize);
static txCallback fxProjectCallback(txMachine* the, txSnapshot* snapshot, txCallback callback);
static void* fxProjectChunk(txMachine* the, void* address);
static txSlot* fxProjectSlot(txMachine* the, txProjection* firstProjection, txSlot* slot);
static txTypeAtomics* fxProjectTypeAtomics(txMachine* the, txTypeAtomics* atomics);
static txTypeDispatch* fxProjectTypeDispatch(txMachine* the, txTypeDispatch* dispatch);
static void fxReadAtom(txMachine* the, txSnapshot* snapshot, Atom* atom, txString type);
static void fxReadMapSet(txMachine* the, txSlot* table, txBoolean paired);
static void fxReadSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot, txFlag flag);
static void fxReadSlotArray(txMachine* the, txSnapshot* snapshot, txSlot* address, txSize length);
static void fxReadSlotTable(txMachine* the, txSnapshot* snapshot, txSlot** address, txSize length);
static void fxUnlinkChunks(txMachine* the);
#define mxUnprojectChunk(ADDRESS) (snapshot->firstChunk + ((size_t)ADDRESS));
static txCallback fxUnprojectCallback(txMachine* the, txSnapshot* snapshot, txCallback callback);
static txSlot* fxUnprojectSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot);
static void fxWriteChunk(txMachine* the, txSnapshot* snapshot, txSlot* slot);
static void fxWriteChunkArray(txMachine* the, txSnapshot* snapshot, txSlot* address, txSize length, txFlag flag);
static void fxWriteChunkBigInt(txMachine* the, txSnapshot* snapshot, void* address, txSize size);
static void fxWriteChunkData(txMachine* the, txSnapshot* snapshot, void* address);
static void fxWriteChunkTable(txMachine* the, txSnapshot* snapshot, txSlot** address, txSize length);
static void fxWriteChunkZero(txMachine* the, txSnapshot* snapshot, txSize size);
static void fxWriteChunks(txMachine* the, txSnapshot* snapshot);
static void fxWriteSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot, txFlag flag);
static void fxWriteSlotTable(txMachine* the, txSnapshot* snapshot, txSlot** address, txSize length);
static void fxWriteSlots(txMachine* the, txSnapshot* snapshot);
static void fxWriteStack(txMachine* the, txSnapshot* snapshot);
#define mxAssert(_ASSERTION,...) { if (!(_ASSERTION)) { fxReport(the, __VA_ARGS__); snapshot->error = C_EINVAL; fxJump(the); } }
#define mxThrowIf(_ERROR) { if (_ERROR) { snapshot->error = _ERROR; fxJump(the); } }
#define mxChunkFlag 0x80000000
#define mxCallbacksLength 496
static txCallback gxCallbacks[mxCallbacksLength] = {
fx_AggregateError,
fx_Array_from,
fx_Array_isArray,
fx_Array_of,
fx_Array_prototype_at,
fx_Array_prototype_concat,
fx_Array_prototype_copyWithin,
fx_Array_prototype_entries,
fx_Array_prototype_every,
fx_Array_prototype_fill,
fx_Array_prototype_filter,
fx_Array_prototype_find,
fx_Array_prototype_findIndex,
fx_Array_prototype_findLast,
fx_Array_prototype_findLastIndex,
fx_Array_prototype_flat,
fx_Array_prototype_flatMap,
fx_Array_prototype_forEach,
fx_Array_prototype_includes,
fx_Array_prototype_indexOf,
fx_Array_prototype_join,
fx_Array_prototype_keys,
fx_Array_prototype_lastIndexOf,
fx_Array_prototype_map,
fx_Array_prototype_pop,
fx_Array_prototype_push,
fx_Array_prototype_reduce,
fx_Array_prototype_reduceRight,
fx_Array_prototype_reverse,
fx_Array_prototype_shift,
fx_Array_prototype_slice,
fx_Array_prototype_some,
fx_Array_prototype_sort,
fx_Array_prototype_splice,
fx_Array_prototype_toLocaleString,
fx_Array_prototype_toString,
fx_Array_prototype_unshift,
fx_Array_prototype_values,
fx_Array,
fx_ArrayBuffer_fromBigInt,
fx_ArrayBuffer_isView,
fx_ArrayBuffer_prototype_concat,
fx_ArrayBuffer_prototype_get_byteLength,
fx_ArrayBuffer_prototype_get_maxByteLength,
fx_ArrayBuffer_prototype_get_resizable,
fx_ArrayBuffer_prototype_resize,
fx_ArrayBuffer_prototype_slice,
fx_ArrayBuffer_prototype_transfer,
fx_ArrayBuffer,
fx_ArrayIterator_prototype_next,
fx_AsyncFromSyncIterator_prototype_next,
fx_AsyncFromSyncIterator_prototype_return,
fx_AsyncFromSyncIterator_prototype_throw,
fx_AsyncFunction,
fx_AsyncGenerator_prototype_next,
fx_AsyncGenerator_prototype_return,
fx_AsyncGenerator_prototype_throw,
fx_AsyncGenerator,
fx_AsyncGeneratorFunction,
fx_AsyncIterator_asyncIterator,
fx_Atomics_add,
fx_Atomics_and,
fx_Atomics_compareExchange,
fx_Atomics_exchange,
fx_Atomics_isLockFree,
fx_Atomics_load,
fx_Atomics_notify,
fx_Atomics_or,
fx_Atomics_store,
fx_Atomics_sub,
fx_Atomics_wait,
fx_Atomics_xor,
fx_BigInt_asIntN,
fx_BigInt_asUintN,
fx_BigInt_bitLength,
fx_BigInt_fromArrayBuffer,
fx_BigInt_prototype_toString,
fx_BigInt_prototype_valueOf,
fx_BigInt,
fx_Boolean_prototype_toString,
fx_Boolean_prototype_valueOf,
fx_Boolean,
fx_Compartment_prototype_evaluate,
fx_Compartment_prototype_get_globalThis,
fx_Compartment_prototype_import,
fx_Compartment_prototype_importNow,
fx_Compartment,
fx_DataView_prototype_buffer_get,
fx_DataView_prototype_byteLength_get,
fx_DataView_prototype_byteOffset_get,
fx_DataView_prototype_getBigInt64,
fx_DataView_prototype_getBigUint64,
fx_DataView_prototype_getFloat32,
fx_DataView_prototype_getFloat64,
fx_DataView_prototype_getInt8,
fx_DataView_prototype_getInt16,
fx_DataView_prototype_getInt32,
fx_DataView_prototype_getUint8,
fx_DataView_prototype_getUint16,
fx_DataView_prototype_getUint32,
fx_DataView_prototype_setBigInt64,
fx_DataView_prototype_setBigUint64,
fx_DataView_prototype_setFloat32,
fx_DataView_prototype_setFloat64,
fx_DataView_prototype_setInt8,
fx_DataView_prototype_setInt16,
fx_DataView_prototype_setInt32,
fx_DataView_prototype_setUint8,
fx_DataView_prototype_setUint16,
fx_DataView_prototype_setUint32,
fx_DataView,
fx_Date_now,
fx_Date_now_secure,
fx_Date_parse,
fx_Date_prototype_getDate,
fx_Date_prototype_getDay,
fx_Date_prototype_getFullYear,
fx_Date_prototype_getHours,
fx_Date_prototype_getMilliseconds,
fx_Date_prototype_getMinutes,
fx_Date_prototype_getMonth,
fx_Date_prototype_getSeconds,
fx_Date_prototype_getTimezoneOffset,
fx_Date_prototype_getUTCDate,
fx_Date_prototype_getUTCDay,
fx_Date_prototype_getUTCFullYear,
fx_Date_prototype_getUTCHours,
fx_Date_prototype_getUTCMilliseconds,
fx_Date_prototype_getUTCMinutes,
fx_Date_prototype_getUTCMonth,
fx_Date_prototype_getUTCSeconds,
fx_Date_prototype_getYear,
fx_Date_prototype_setDate,
fx_Date_prototype_setFullYear,
fx_Date_prototype_setHours,
fx_Date_prototype_setMilliseconds,
fx_Date_prototype_setMinutes,
fx_Date_prototype_setMonth,
fx_Date_prototype_setSeconds,
fx_Date_prototype_setTime,
fx_Date_prototype_setUTCDate,
fx_Date_prototype_setUTCFullYear,
fx_Date_prototype_setUTCHours,
fx_Date_prototype_setUTCMilliseconds,
fx_Date_prototype_setUTCMinutes,
fx_Date_prototype_setUTCMonth,
fx_Date_prototype_setUTCSeconds,
fx_Date_prototype_setYear,
fx_Date_prototype_toDateString,
fx_Date_prototype_toISOString,
fx_Date_prototype_toJSON,
fx_Date_prototype_toPrimitive,
fx_Date_prototype_toString,
fx_Date_prototype_toTimeString,
fx_Date_prototype_toUTCString,
fx_Date_prototype_valueOf,
fx_Date_UTC,
fx_Date,
fx_Date_secure,
fx_decodeURI,
fx_decodeURIComponent,
fx_encodeURI,
fx_encodeURIComponent,
fx_Enumerator_next,
fx_Enumerator,
fx_Error_prototype_get_stack,
fx_Error_toString,
fx_Error,
fx_escape,
fx_eval,
fx_EvalError,
// fx_FinalizationRegistry_prototype_cleanupSome,
fx_FinalizationRegistry_prototype_register,
fx_FinalizationRegistry_prototype_unregister,
fx_FinalizationRegistry,
fx_Function_prototype_apply,
fx_Function_prototype_bind,
fx_Function_prototype_bound,
fx_Function_prototype_call,
fx_Function_prototype_hasInstance,
fx_Function_prototype_toString,
fx_Function,
fx_Generator_prototype_next,
fx_Generator_prototype_return,
fx_Generator_prototype_throw,
fx_Generator,
fx_GeneratorFunction,
fx_isFinite,
fx_isNaN,
fx_Iterator_iterator,
fx_JSON_parse,
fx_JSON_stringify,
fx_Map_prototype_clear,
fx_Map_prototype_delete,
fx_Map_prototype_entries,
fx_Map_prototype_forEach,
fx_Map_prototype_get,
fx_Map_prototype_has,
fx_Map_prototype_keys,
fx_Map_prototype_set,
fx_Map_prototype_size,
fx_Map_prototype_values,
fx_Map,
fx_MapIterator_prototype_next,
fx_Math_abs,
fx_Math_acos,
fx_Math_acosh,
fx_Math_asin,
fx_Math_asinh,
fx_Math_atan,
fx_Math_atan2,
fx_Math_atanh,
fx_Math_cbrt,
fx_Math_ceil,
fx_Math_clz32,
fx_Math_cos,
fx_Math_cosh,
fx_Math_exp,
fx_Math_expm1,
fx_Math_floor,
fx_Math_fround,
fx_Math_hypot,
fx_Math_idiv,
fx_Math_idivmod,
fx_Math_imod,
fx_Math_imul,
fx_Math_imuldiv,
fx_Math_irem,
fx_Math_log,
fx_Math_log1p,
fx_Math_log2,
fx_Math_log10,
fx_Math_max,
fx_Math_min,
fx_Math_mod,
fx_Math_pow,
fx_Math_random,
fx_Math_random_secure,
fx_Math_round,
fx_Math_sign,
fx_Math_sin,
fx_Math_sinh,
fx_Math_sqrt,
fx_Math_tan,
fx_Math_tanh,
fx_Math_trunc,
fx_ModuleSource,
fx_ModuleSource_prototype_get_bindings,
fx_ModuleSource_prototype_get_needsImport,
fx_ModuleSource_prototype_get_needsImportMeta,
fx_Number_isFinite,
fx_Number_isInteger,
fx_Number_isNaN,
fx_Number_isSafeInteger,
fx_Number_prototype_toExponential,
fx_Number_prototype_toFixed,
fx_Number_prototype_toLocaleString,
fx_Number_prototype_toPrecision,
fx_Number_prototype_toString,
fx_Number_prototype_valueOf,
fx_Number,
fx_Object_assign,
fx_Object_copy,
fx_Object_create,
fx_Object_defineProperties,
fx_Object_defineProperty,
fx_Object_entries,
fx_Object_freeze,
fx_Object_fromEntries,
fx_Object_getOwnPropertyDescriptor,
fx_Object_getOwnPropertyDescriptors,
fx_Object_getOwnPropertyNames,
fx_Object_getOwnPropertySymbols,
fx_Object_getPrototypeOf,
fx_Object_hasOwn,
fx_Object_is,
fx_Object_isExtensible,
fx_Object_isFrozen,
fx_Object_isSealed,
fx_Object_keys,
fx_Object_preventExtensions,
fx_Object_prototype___defineGetter__,
fx_Object_prototype___defineSetter__,
fx_Object_prototype___lookupGetter__,
fx_Object_prototype___lookupSetter__,
fx_Object_prototype___proto__get,
fx_Object_prototype___proto__set,
fx_Object_prototype_hasOwnProperty,
fx_Object_prototype_isPrototypeOf,
fx_Object_prototype_propertyIsEnumerable,
fx_Object_prototype_toLocaleString,
fx_Object_prototype_toString,
fx_Object_prototype_valueOf,
fx_Object_seal,
fx_Object_setPrototypeOf,
fx_Object_values,
fx_Object,
fx_parseFloat,
fx_parseInt,
fx_Promise_all,
fx_Promise_allSettled,
fx_Promise_any,
fx_Promise_prototype_catch,
fx_Promise_prototype_finally,
fx_Promise_prototype_then,
fx_Promise_race,
fx_Promise_reject,
fx_Promise_resolve,
fx_Promise,
fx_Proxy_revocable,
fx_Proxy_revoke,
fx_Proxy,
fx_RangeError,
fx_ReferenceError,
fx_Reflect_apply,
fx_Reflect_construct,
fx_Reflect_defineProperty,
fx_Reflect_deleteProperty,
fx_Reflect_get,
fx_Reflect_getOwnPropertyDescriptor,
fx_Reflect_getPrototypeOf,
fx_Reflect_has,
fx_Reflect_isExtensible,
fx_Reflect_ownKeys,
fx_Reflect_preventExtensions,
fx_Reflect_set,
fx_Reflect_setPrototypeOf,
fx_RegExp_prototype_compile,
fx_RegExp_prototype_exec,
fx_RegExp_prototype_get_dotAll,
fx_RegExp_prototype_get_flags,
fx_RegExp_prototype_get_global,
fx_RegExp_prototype_get_hasIndices,
fx_RegExp_prototype_get_ignoreCase,
fx_RegExp_prototype_get_multiline,
fx_RegExp_prototype_get_source,
fx_RegExp_prototype_get_sticky,
fx_RegExp_prototype_get_unicode,
fx_RegExp_prototype_match,
fx_RegExp_prototype_matchAll_next,
fx_RegExp_prototype_matchAll,
fx_RegExp_prototype_replace,
fx_RegExp_prototype_search,
fx_RegExp_prototype_split,
fx_RegExp_prototype_test,
fx_RegExp_prototype_toString,
fx_RegExp,
fx_Set_prototype_add,
fx_Set_prototype_clear,
fx_Set_prototype_delete,
fx_Set_prototype_entries,
fx_Set_prototype_forEach,
fx_Set_prototype_has,
fx_Set_prototype_size,
fx_Set_prototype_values,
fx_Set,
fx_SetIterator_prototype_next,
fx_SharedArrayBuffer_prototype_get_byteLength,
fx_SharedArrayBuffer_prototype_get_growable,
fx_SharedArrayBuffer_prototype_get_maxByteLength,
fx_SharedArrayBuffer_prototype_grow,
fx_SharedArrayBuffer_prototype_slice,
fx_SharedArrayBuffer,
fx_species_get,
fx_String_fromCharCode,
fx_String_fromCodePoint,
fx_String_prototype_at,
fx_String_prototype_charAt,
fx_String_prototype_charCodeAt,
fx_String_prototype_codePointAt,
fx_String_prototype_compare,
fx_String_prototype_concat,
fx_String_prototype_endsWith,
fx_String_prototype_includes,
fx_String_prototype_indexOf,
fx_String_prototype_iterator_next,
fx_String_prototype_iterator,
fx_String_prototype_lastIndexOf,
fx_String_prototype_localeCompare,
fx_String_prototype_match,
fx_String_prototype_matchAll,
fx_String_prototype_normalize,
fx_String_prototype_padEnd,
fx_String_prototype_padStart,
fx_String_prototype_repeat,
fx_String_prototype_replace,
fx_String_prototype_replaceAll,
fx_String_prototype_search,
fx_String_prototype_slice,
fx_String_prototype_split,
fx_String_prototype_startsWith,
fx_String_prototype_substr,
fx_String_prototype_substring,
fx_String_prototype_toLowerCase,
fx_String_prototype_toUpperCase,
fx_String_prototype_trim,
fx_String_prototype_trimEnd,
fx_String_prototype_trimStart,
fx_String_prototype_valueOf,
fx_String_raw,
fx_String,
fx_Symbol_for,
fx_Symbol_keyFor,
fx_Symbol_prototype_get_description,
fx_Symbol_prototype_toPrimitive,
fx_Symbol_prototype_toString,
fx_Symbol_prototype_valueOf,
fx_Symbol,
fx_SyntaxError,
fx_trace_center,
fx_trace_left,
fx_trace_right,
fx_trace,
fx_TypedArray_from,
fx_TypedArray_of,
fx_TypedArray_prototype_at,
fx_TypedArray_prototype_buffer_get,
fx_TypedArray_prototype_byteLength_get,
fx_TypedArray_prototype_byteOffset_get,
fx_TypedArray_prototype_copyWithin,
fx_TypedArray_prototype_entries,
fx_TypedArray_prototype_every,
fx_TypedArray_prototype_fill,
fx_TypedArray_prototype_filter,
fx_TypedArray_prototype_find,
fx_TypedArray_prototype_findIndex,
fx_TypedArray_prototype_findLast,
fx_TypedArray_prototype_findLastIndex,
fx_TypedArray_prototype_forEach,
fx_TypedArray_prototype_includes,
fx_TypedArray_prototype_indexOf,
fx_TypedArray_prototype_join,
fx_TypedArray_prototype_keys,
fx_TypedArray_prototype_lastIndexOf,
fx_TypedArray_prototype_length_get,
fx_TypedArray_prototype_map,
fx_TypedArray_prototype_reduce,
fx_TypedArray_prototype_reduceRight,
fx_TypedArray_prototype_reverse,
fx_TypedArray_prototype_set,
fx_TypedArray_prototype_slice,
fx_TypedArray_prototype_some,
fx_TypedArray_prototype_sort,
fx_TypedArray_prototype_subarray,
fx_TypedArray_prototype_toLocaleString,
fx_TypedArray_prototype_toStringTag_get,
fx_TypedArray_prototype_values,
fx_TypedArray,
fx_TypeError,
fx_unescape,
fx_URIError,
fx_WeakMap_prototype_delete,
fx_WeakMap_prototype_get,
fx_WeakMap_prototype_has,
fx_WeakMap_prototype_set,
fx_WeakMap,
fx_WeakRef_prototype_deref,
fx_WeakRef,
fx_WeakSet_prototype_add,
fx_WeakSet_prototype_delete,
fx_WeakSet_prototype_has,
fx_WeakSet,
fxAsyncGeneratorRejectAwait,
fxAsyncGeneratorRejectYield,
fxAsyncGeneratorResolveAwait,
fxAsyncGeneratorResolveYield,
fxAsyncFromSyncIteratorDone,
fxArrayLengthGetter,
fxArrayLengthSetter,
fxExecuteModulesFulfilled,
fxExecuteModulesRejected,
fxExecuteVirtualModuleSource,
fxExecuteVirtualModuleSourceImport,
fxInitializeRegExp,
fxLoadModulesFulfilled,
fxLoadModulesRejected,
fxModuleGetter,
fxOnRejectedPromise,
fxOnResolvedPromise,
fxOnThenable,
fxOrdinaryToPrimitive,
fxProxyGetter,
fxProxySetter,
fxStringAccessorGetter,
fxStringAccessorSetter,
fxThrowTypeError,
fxTypedArrayGetter,
fxTypedArraySetter,
fxCombinePromisesCallback,
fxNewPromiseCapabilityCallback,
fxRejectAwait,
fxRejectPromise,
fxResolveAwait,
fxResolvePromise,
fx_Promise_prototype_finallyAux,
fx_Promise_prototype_finallyReturn,
fx_Promise_prototype_finallyThrow,
};
extern const txTypeDispatch gxTypeDispatches[];
extern const txTypeAtomics gxTypeAtomics[];
void fxIndexInstance(txMachine* the, txSnapshot* snapshot, txSlot* theCurrent)
{
txSlot* aProperty;
txSlot* aTemporary;
mxCheck(the, theCurrent->kind == XS_INSTANCE_KIND);
aProperty = theCurrent;
theCurrent->value.instance.garbage = C_NULL;
for (;;) {
if (aProperty) {
if (!(aProperty->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aProperty);
switch (aProperty->kind) {
case XS_INSTANCE_KIND:
aTemporary = aProperty->value.instance.prototype;
if (aTemporary && !(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->value.instance.prototype = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
else
aProperty = aProperty->next;
break;
case XS_REFERENCE_KIND:
aTemporary = aProperty->value.reference;
if (!(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->value.reference = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
else
aProperty = aProperty->next;
break;
case XS_PROXY_KIND:
aTemporary = aProperty->value.proxy.handler;
if (aTemporary && !(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->flag |= XS_INSPECTOR_FLAG;
aProperty->value.proxy.handler = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
else {
aTemporary = aProperty->value.proxy.target;
if (aTemporary && !(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->value.proxy.target = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
else
aProperty = aProperty->next;
}
break;
case XS_CLOSURE_KIND:
aTemporary = aProperty->value.closure;
if (aTemporary && !(aTemporary->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aTemporary);
if (aTemporary->kind == XS_REFERENCE_KIND) {
aTemporary = aTemporary->value.reference;
if (!(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->value.closure->value.reference = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
}
else {
fxIndexReference(the, snapshot, aTemporary);
aProperty = aProperty->next;
}
}
else
aProperty = aProperty->next;
break;
default:
fxIndexReference(the, snapshot, aProperty);
aProperty = aProperty->next;
break;
}
}
else
aProperty = aProperty->next;
}
else if (theCurrent->value.instance.garbage) {
aProperty = theCurrent->value.instance.garbage;
theCurrent->value.instance.garbage = C_NULL;
switch (aProperty->kind) {
case XS_INSTANCE_KIND:
aTemporary = aProperty->value.instance.prototype;
aProperty->value.instance.prototype = theCurrent;
theCurrent = aTemporary;
aProperty = aProperty->next;
break;
case XS_REFERENCE_KIND:
aTemporary = aProperty->value.reference;
aProperty->value.reference = theCurrent;
theCurrent = aTemporary;
aProperty = aProperty->next;
break;
case XS_PROXY_KIND:
if (aProperty->flag & XS_INSPECTOR_FLAG) {
aProperty->flag &= ~XS_INSPECTOR_FLAG;
aTemporary = aProperty->value.proxy.handler;
aProperty->value.proxy.handler = theCurrent;
theCurrent = aTemporary;
aTemporary = aProperty->value.proxy.target;
if (aTemporary && !(aTemporary->flag & XS_MARK_FLAG)) {
aProperty->value.proxy.target = theCurrent;
theCurrent = aTemporary;
theCurrent->value.instance.garbage = aProperty;
aProperty = theCurrent;
}
else {
aProperty = aProperty->next;
}
}
else {
aTemporary = aProperty->value.proxy.target;
aProperty->value.proxy.target = theCurrent;
theCurrent = aTemporary;
aProperty = aProperty->next;
}
break;
case XS_CLOSURE_KIND:
aTemporary = aProperty->value.closure->value.reference;
aProperty->value.closure->value.reference = theCurrent;
theCurrent = aTemporary;
aProperty = aProperty->next;
break;
}
}
else
break;
}
}
void fxIndexReference(txMachine* the, txSnapshot* snapshot, txSlot* theSlot)
{
txSlot* aSlot;
switch (theSlot->kind) {
case XS_REFERENCE_KIND:
aSlot = theSlot->value.reference;
if (!(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_CLOSURE_KIND:
aSlot = theSlot->value.closure;
if (aSlot && (!(aSlot->flag & XS_MARK_FLAG))) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
}
break;
case XS_INSTANCE_KIND:
if (!(theSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, theSlot);
break;
case XS_ACCESSOR_KIND:
aSlot = theSlot->value.accessor.getter;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
aSlot = theSlot->value.accessor.setter;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_ARGUMENTS_SLOPPY_KIND:
case XS_ARGUMENTS_STRICT_KIND:
case XS_ARRAY_KIND:
case XS_STACK_KIND:
fxCheckCStack(the);
if ((aSlot = theSlot->value.array.address)) {
txIndex aLength = (((txChunk*)(((txByte*)aSlot) - sizeof(txChunk)))->size) / sizeof(txSlot);
while (aLength) {
fxIndexReference(the, snapshot, aSlot);
aSlot++;
aLength--;
}
}
break;
case XS_CODE_KIND:
case XS_CODE_X_KIND:
aSlot = theSlot->value.code.closures;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG)) {
fxCheckCStack(the);
fxIndexInstance(the, snapshot, aSlot);
}
break;
case XS_HOME_KIND:
aSlot = theSlot->value.home.object;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG)) {
fxCheckCStack(the);
fxIndexInstance(the, snapshot, aSlot);
}
aSlot = theSlot->value.home.module;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG)) {
fxCheckCStack(the);
fxIndexInstance(the, snapshot, aSlot);
}
break;
case XS_MODULE_KIND:
case XS_PROGRAM_KIND:
fxCheckCStack(the);
aSlot = theSlot->value.module.realm;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_EXPORT_KIND:
aSlot = theSlot->value.export.closure;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
}
aSlot = theSlot->value.export.module;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_HOST_KIND:
// ??
break;
case XS_PROXY_KIND:
aSlot = theSlot->value.proxy.handler;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
aSlot = theSlot->value.proxy.target;
if (aSlot && !(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_ERROR_KIND:
aSlot = theSlot->value.error.info;
if (aSlot && (!(aSlot->flag & XS_MARK_FLAG)))
fxIndexInstance(the, snapshot, aSlot);
break;
case XS_LIST_KIND:
aSlot = theSlot->value.list.first;
while (aSlot) {
if (!(aSlot->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
}
aSlot = aSlot->next;
}
break;
case XS_PRIVATE_KIND:
aSlot = theSlot->value.private.check;
if (!(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
aSlot = theSlot->value.private.first;
while (aSlot) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
aSlot = aSlot->next;
}
break;
case XS_WEAK_MAP_KIND:
case XS_WEAK_SET_KIND:
aSlot = theSlot->value.weakList.first;
while (aSlot) {
if (!(aSlot->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
}
aSlot = aSlot->next;
}
break;
case XS_WEAK_ENTRY_KIND:
aSlot = theSlot->value.weakEntry.check;
if (aSlot->flag & XS_MARK_FLAG) {
aSlot = theSlot->value.weakEntry.value;
if (!(aSlot->flag & XS_MARK_FLAG)) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
}
}
break;
case XS_FINALIZATION_REGISTRY_KIND:
aSlot = theSlot->value.finalizationRegistry.callback;
if (aSlot) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot);
aSlot = aSlot->next;
while (aSlot) {
fxIndexSlot(the, snapshot, aSlot);
fxIndexReference(the, snapshot, aSlot); // holdings
aSlot = aSlot->next;
if (aSlot) {
fxIndexSlot(the, snapshot, aSlot);
// weak target and token
aSlot = aSlot->next;
}
}
}
break;
case XS_HOST_INSPECTOR_KIND:
aSlot = theSlot->value.hostInspector.cache;
if (!(aSlot->flag & XS_MARK_FLAG))
fxIndexInstance(the, snapshot, aSlot);
break;
}
}
void fxIndexSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot)
{
slot->flag |= XS_MARK_FLAG;
txProjection* projection = snapshot->firstProjection;
while (projection) {
txSlot* heap = projection->heap;
txSlot* limit = projection->limit;
if ((heap < slot) && (slot < limit)) {
projection->indexes[slot - heap] = snapshot->slotSize;
snapshot->slotSize++;
return;
}
projection = projection->nextProjection;
}
}
void fxIndexSlots(txMachine* the, txSnapshot* snapshot)
{
txSlot* heap;
txSlot* limit;
txProjection** projectionAddress = &(snapshot->firstProjection);
txProjection* projection;
txSlot* slot;
txSlot** slotAddress;
txID id;
size_t* indexAddress;
heap = the->firstHeap;
while (heap) {
limit = heap->value.reference;
projection = c_calloc(sizeof(txProjection) + (limit - heap - 1) * sizeof(size_t), 1);
if (!projection) { snapshot->error = C_ENOMEM; fxJump(the); }
projection->heap = heap;
projection->limit = limit;
*projectionAddress = projection;
projectionAddress = &projection->nextProjection;
heap = heap->next;
}
snapshot->slotSize = 1;
slotAddress = the->keyArray;
id = the->keyIndex;
while (id) {
if ((slot = *slotAddress)) {
fxIndexSlot(the, snapshot, slot);
fxIndexReference(the, snapshot, slot);
}
slotAddress++;
id--;
}
slot = the->stackTop;
while (slot > the->stack) {
slot--;
fxIndexReference(the, snapshot, slot);
}
snapshot->slots = c_calloc(sizeof(txSlot*) * snapshot->slotSize, 1);
if (!snapshot->slots) { snapshot->error = C_ENOMEM; fxJump(the); }
projection = snapshot->firstProjection;
while (projection) {
heap = projection->heap;
limit = projection->limit;
slot = heap + 1;
indexAddress = &projection->indexes[1];
while (slot < limit) {
if (slot->flag & XS_MARK_FLAG) {
slot->flag &= ~XS_MARK_FLAG;
snapshot->slots[*indexAddress] = slot;
}
slot++;
indexAddress++;
}
projection = projection->nextProjection;
}
slot = the->stackTop;
while (slot > the->stack) {
slot--;
slot->flag &= ~XS_MARK_FLAG;
}
}
void fxLinkChunks(txMachine* the)
{
txBlock* block = the->firstBlock;
while (block) {
txByte* current = ((txByte*)block) + sizeof(txBlock);
txByte* limit = block->current;
while (current < limit) {
txSize size = ((txChunk*)current)->size;
size &= ~mxChunkFlag;
((txChunk*)current)->size = size;
txByte* next = current + size;
((txChunk*)current)->temporary = next;
current = next;
}
block = block->nextBlock;
}
}
void fxMeasureSlot(txMachine* the, txSnapshot* snapshot, txSlot* slot, txSize* chunkSize)
{
switch (slot->kind) {
case XS_STRING_KIND:
fxMeasureChunk(the, snapshot, slot->value.string, chunkSize);
break;
case XS_BIGINT_KIND:
fxMeasureChunk(the, snapshot, slot->value.bigint.data, chunkSize);
break;
case XS_ARGUMENTS_SLOPPY_KIND:
case XS_ARGUMENTS_STRICT_KIND:
case XS_ARRAY_KIND:
case XS_STACK_KIND:
if (slot->value.array.address)